Process of removing the toxic constituents from coffee.



UNITED STATES PATENT OFFICE.

HERMANN DE PURY, OF NEUCHATEL, SWITZERLAND, ASSIGNOR T0 ATOXICAFE A., OF CLARENS, MONTREUX, SWITZERLAND, A CORPORATION OF SWITZERLAND.

No Drawing.

Specification of Letters Patent.

Application filed May 28, 1912. Serial No. 700,285.

Patented Oct. 15, 1912.

To all whom it may concern:

Be it known that I, HERMANN DE PURY, a citizen of the Swiss Confederation, residing at Neuchatel, in the Canton of hleuchatel Switzerland, have invented certain new and useful Improvements in Processes of Removing the Toxic Constituents from Coffee, of Which the following is a specification.

The subject of the present invention is a process for destroying the toxic materials contained in the raw beans of the coffee plant. 7

This process comprises W0 principal operations, the first of which consists in subjecting, the raw coffee beans to an operation having for its object to cause the bursting of the ligneous cells in the interior of which the toxic materials are located.

The second operation consists in roasting them in the presence of a current of air at a high temperature, approximately equal to that at Which coffee beans are roasted, the ligneous cells of the beans being opened by the above operation. By this second operation thecofiee loses, on the one hand, by volatilization all the volatile toxic constituents which are driven oil by the hot current of air, and on the other hand, by sublimation loses all the free calfeine.

The first operation may be effected by one or other of the known processes, for example, by germination or by subjecting the beans in an autoclave alternatively to steam under pressure and to a vacuum.

The roasting operation may be effected in a roasting apparatus of any suitable kind provided that it permits the passage of a current of hot air through the mass of colfce.

By the process above described all the toxic constituents in the coffee are eliminated without the employment of chemicals.

The process of removing the toxic constituents from coilee, comprising two successive operations, which consist in causing the ligneous cells of the green coffee bean to burst, and then roasting the beans in the presence of a current of hot air.

In testimony whereof I have aflixed my signature in presence of two witnesses.

HERMANN or. PURY. Witnesses E. C. MEDARIS, .G., H. STRAUSS. 

